... because the latter plays games with the privileges for language SQL.
It looks like running alter_generic in parallel with "misc" is OK though.
Also, adjust serial_schedule to maintain the same test ordering (up to
parallelism) as parallel_schedule.
# ----------
# Another group of parallel tests
# ----------
-test: privileges security_label collate alter_generic
+test: privileges security_label collate
+
+# ----------
+# Another group of parallel tests
+# ----------
+test: misc alter_generic
-test: misc
# rules cannot run concurrently with any test that creates a view
test: rules
# event triggers cannot run concurrently with any test that runs DDL
test: create_type
test: create_table
test: create_function_2
-test: create_function_3
test: copy
test: copyselect
test: create_misc
test: create_index
test: create_view
test: create_aggregate
+test: create_function_3
test: create_cast
test: constraints
test: triggers
test: security_label
test: collate
test: misc
+test: alter_generic
test: rules
test: event_trigger
test: select_views
test: conversion
test: truncate
test: alter_table
-test: alter_generic
test: sequence
test: polymorphism
test: rowtypes